One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(6,8)(9,10)(11,13)(12,14)(15,16)(17,18)(19,28)(20,25)(21,26)(22,36)(23,30)(24,34)(27,35)(29,43)(31,40)(32,39)(33,44)(37,42)(38,48)(41,46)(45,47) involution — undirected(1,2)(3,6)(4,5)(7,8)(9,10)(11,15)(12,14)(13,16)(17,19,21,30)(18,23,26,28)(20,32,33,29)(22,31,35,47)(24,41,42,38)(25,43,44,39)(27,40,36,45)(34,48,37,46)(9,11)(10,13)(12,16)(14,15)(17,20,21,33)(18,24,26,42)(19,29,30,32)(22,37,35,34)(23,38,28,41)(25,27,44,36)(31,48,47,46)(39,40,43,45)(2,5)(6,8)(11,16)(13,15)(17,20)(18,25)(19,29)(21,33)(22,34)(23,39)(24,36)(26,44)(27,42)(28,43)(30,32)(31,46)(35,37)(38,45)(40,41)(47,48) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,15)(18,26)(20,33)(23,28)(27,36)(29,32)(34,37)(40,45)(46,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.